Abstract: A seismic reflection data acquisition method adopts concentric circle equal offset, which is in the engineering geophysical exploration technology field. Specifically the receivers are placed in a way of concentric circle. Choose a compact point on the rock on the tunnel surface; takes the hypocenter as the center and set three concentric survey circles; stimulates seismic waves at the center and receives the reflection wave from the place ahead of the tunnel face by the receivers. A 3D graphics is created based on the positions of the receivers on the tunnel face, by which a 3D geotectonic face is able to be observed clearly through corresponding analysis processing method to receive the information of structures and defective geological bodies ahead.

Abstract: In a method for enabling devices to communicate securely, a first device dynamically generates a human body nonce (HBN) and then sends that HBN to a second device via a human body communication conduit (HBCC). After sending the HBN from the first device to the second device, the first device uses the HBN to establish security for an over-the-air (OTA) communication session between the first device and the second device. For instance, the first device may derive a key, based at least in part on the HBN, and the first device may use the key to encrypt communications to be sent OTA between the first device and the second device. Other embodiments are described and claimed.

Abstract: In a method for enabling devices to communicate securely, a first device dynamically generates a human body nonce (HBN) and then sends that HBN to a second device via a human body communication conduit (HBCC). After sending the HBN from the first device to the second device, the first device uses the HBN to establish security for an over-the-air (OTA) communication session between the first device and the second device. For instance, the first device may derive a key, based at least in part on the HBN, and the first device may use the key to encrypt communications to be sent OTA between the first device and the second device. Other embodiments are described and claimed.